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This treatment follows the similar treatment of the PEG solution but instead of replacing the cells with another solution, the cells are replaced with alcohol and when the alcohol evaporates the cell and overall object is dehydrated. As a volatile solvent treatment option, the impact on the health and safety on the workplace must be considered.
The National Association of Underwater Instructors (NAUI Worldwide) is a nonprofit association of scuba instructors founded in 1960 by Albert Tillman and Neal Hess. [2] [3]NAUI primarily serves as a recreational dive certification and membership organization, providing international diver standards and education programs.
SSI was founded by Robert Clark in 1970. [2] SSI headquarters was in Fort Collins, Colorado, and it is owned by Concept Systems International, Inc.In 2008, it was acquired by Doug McNeese, owner of the National Association of Scuba Diving Schools (USA) until its merger with SSI in 1999, and Robert Stoss, manager of Scubapro and Seemann Sub.
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SCUBA Diving International, launched in 1998 or 1999, [1] [2] is the sister organization of Technical Diving International. [7] SDI was created by dive professionals from the technical diving field. This gives the organization the perspective of teaching recreational diving through the lens of experienced technical diving.
Snorkeling is an activity in its own right, as well as an adjunct to other activities, such as breath-hold diving, spearfishing and scuba diving, [27] and several competitive underwater sports, such as underwater hockey and finswimming. In all cases, the use of a snorkel facilitates breathing while swimming at the surface and observing what is ...
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Technical diver during a decompression stop. There is some professional disagreement as to what exactly technical diving encompasses. [9] [10] [11] Nitrox diving and rebreather diving were originally considered technical, but this is no longer universally the case as several certification agencies now offer Recreational Nitrox and recreational rebreather training and certification.